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Phenolphtalein, ACS
Key Features and Details
Phenolphtalein, ACS
SYNONYMS: 3,3-bis[4-Hydroxyphenyl]-1-[3H]- isobenzofuranone; 3,3-bis(p-Hydroxyphenyl) phthalide; a-(p-Hydroxyphenyl)-a-(4-oxo-2,5-cyclohexadien-1-ylidine)-o-toluic acid
CAS: #
77-09-8
MOLECULAR FORMULA: C20H14O4
MOLECULAR WEIGHT: 318.328 g/mol
BEILSTEIN REGISTRY No.: 284423
EC No: 201-004-7
MDL No: MFCD00005913
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PRODUCT DESCRIPTION
Phenolphtalein, ACS
Application Notes
Phenolphthalein Can be used in a 1% alcoholic solution as an indicator in titrations of mineral and organic acids and most alkalies. Not suitable for ammonia. Very sensitive to CO2; and, in estimating carbonates, the liquid must be boiled. Borax can be titrated with phenolphthalein as an indicator only when glycerol is present, because the color gradually fades away as the acid is added. Usable with a few alkaloids.
Usage Statement
Unless specified otherwise, MP Biomedical's products are for research or further manufacturing use only, not for direct human use. For more information, please contact our customer service department.
Key Applications
Indicator in titrations of mineral and organic acids and most alkalies
SPECIFICATIONS
SKU: 02102608-CF
Base Catalog Number: 102608
Alternate Names: 3,3-bis[4-Hydroxyphenyl]-1-[3H]- isobenzofuranone; 3,3-bis(p-Hydroxyphenyl) phthalide; a-(p-Hydroxyphenyl)-a-(4-oxo-2,5-cyclohexadien-1-ylidine)-o-toluic acid
Beilstein Registration No
: 284423
CAS
: #
77-09-8
Color Index
: 764
Density
: 1.299 at 77° F (NTP, 1992)
EC No
: 201-004-7
Format
: Powder
Grade
: ACS
Hazard Statements
: H341-H350-H361
MDL No
: MFCD00005913
Melting Point
: 496 to 504° F (NTP, 1992)
Molecular Formula
: C20H14O4
Molecular Weight
: 318.328 g/mol
pKa
: 9.7 at 25 °C(Lit.)
PPE
: Eyeshields, full-face particle respirator, Gloves, respirator filter, respirator cartridges
RTECS No
: SM8380000
Safety Symbol
: GHS08
Solubility
: less than 1 mg/mL at 66° F (NTP, 1992)
UV Visible Absorbance
: ?max 552 nm?max 374 nm (2nd)
Vapor Pressure
: 6.7X10-13 mm Hg @ 25 deg C /Estimated/
